Kobi Samoray 5c68ca7bb2 NSXV: protect against stale LB bindings
When a stale load balancer binding remains in the Neutron DB while the
load balancer was deleted, it causes FWaaS failures.

To protect agains, we take the following measures:
- Use try-catch to ignore the LB edge firewall rule while performing
FWaaS transactions.
- Delete the LB binding while deleting the router, while routers are
used as LB platform.

Change-Id: I3ab60093e3ac8ce6ff1d3557622745484d43b759
2021-03-15 17:15:13 +02:00
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